Title: Sun Solaris RWall Daemon Syslog Format String Vulnerability
Severity: CRITICAL
Description:
Solaris is the freely available UNIX-derivative operating system developed and distributed by Sun Microsystems.
A problem with the 'rwall' daemon in Solaris may allow a remote user to gain local access and elevated privileges.
The rwall daemon is a remote 'wall' facility designed for sending system broadcast messages. It works by passing the requests from system to system via RPC, and handling the starting of the rwall daemon with 'inetd'.
Remote attackers can execute arbitrary code on vulnerable systems. When malicious format strings are sent from one system to another, an insecure 'syslog' call may allow a remote attacker to exploit the call to execute arbitrary code.
Note that this vulnerability requires the functioning of 'inetd' and 'rwalld'. Systems that have disabled rwalld from the inetd configuration or have disabled inetd altogether are not vulnerable to this issue. Note also that a successful exploit will allow arbitrary code to run as root.
Affected Products:
- Sun Solaris 2.5.1
- Sun Solaris 2.5.1_x86
- Sun Solaris 2.6
- Sun Solaris 2.6_x86
- Sun Solaris 7.0
- Sun Solaris 7.0_x86
- Sun Solaris 8
- Sun Solaris 8_x86
- Sun Solaris 9
References:
- CORE Security: rpc.walld format string exploit
- Sun: Security Vulnerability in the rpc.rwalld(1M) Daemon
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